Imari Sato Takahiro Okabe Yoichi Sato Katsushi Ikeuchi Appearance Sampling for Obtaining A Set of Basis Images for Variable Illumination. 800-807 2003 conf/iccv/2003 ICCV http://csdl.computer.org/comp/proceedings/iccv/2003/1950/02/195020800abs.htm db/conf/iccv/iccv2003-2.html#SatoOSI03